Regex, wordpress, and Search Regex plugin - removing affiliate links - regex

Question

I have a wordpress blog(s), in which I am trying to use plugin named 'Search Regex' to remove a part of post text, that I've placed as advertisement on the bottom (don't ask)
Now, I'm spinning around for a few months trying to find a proper answer on this, I know mysql doesn't support regex fully, and it would probably be painful to even try doing it that way, so I decided to use this plugin.
My wordpress blog have couple of thousands of posts, with almost the same code on the bottom, and code looks something like this:
<!--more-->
<br />
<center>
<table width="100%">
<tbody>
<tr>
<td bgcolor="#000000" style="text-align: center; font-size: 16px; font-weight: bold;">
<a href="http://myaffiliate.com/?q2=affiliateid" target="_blank" rel="nofollow" ><img title="blabla" src="http://someimage.com/somewhere></a><br />
<b>Some random Blah</b>
</td>
</tr>
</tbody>
</table>
</center>
Everything outside is fixed and doesn't change, and everything inside tags is changing with each post.
Now, this is multiline text, and I SERIOUSLY have problem finding a matching string, and even tool, that could help me solving this puzzle. I have this spreaded on several blogs, and I figured that instead of spamming my blog with same repetitive code that makes 1/3rd of all content I have in my posts, I can simply include it through single.php
So, I want this permanently deleted from my database.
Thanks in advance for help.

Answer 1

I'm not an expert on blogs or regex, but couldn't you use a python script to substitute all that text to replace it?
Something like this
re.sub(r' <!--more-->
<br />
<center>
<table width="100%">
<tbody>
<tr>
[\.]+
</td>
</tr>
</tbody>
</table>
</center>
', "")
If I'm not wrong, that should find all the cases where it finds an ad and replace it with a blank string :)

Answer 2

You could try something like this (always take a backup before testing)
global $wpdb;
$posts=$wpdb->get_results("SELECT ID,post_content FROM {$wpdb->posts} LIMIT 0,1");
foreach($posts as $p){
$pos = strpos($p->post_content, '<!--more-->');
$more_content = substr($p->post_content,$pos);
if($pos !== false && strstr($more_content,"myaffiliate.com" && $p->ID>0)){
$content = substr($p->post_content,0,$pos-1);
$wpdb->query($wpdb->prepare("UPDATE {$wpdb->posts} SET post_content='%s' WHERE ID=%d",$content,$p->ID));
}
}
This is untested, but you get the idea.
This will remove the post content part after <!--more--> if it contains the string "myaffiliate.com" (this is somewhat lazy matching, but we could refine it with preg_match or preg_replace if you need it).
You could use LIMIT 0,1 while testing and then increase it to your needs.